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Letters Patent No. 74,785, dated February 25, 1.86.8.

IMPROVEMENT IN MIAGEINES/FORf BORING POST-HOLES. f

TO ALL WHOM IT MAY CONCERN:

. l Be it known that I, A. Q. ALLIS, of Dayton, ln the county ofMontgomery, and State'of Ohio, have invented a new and improvedMachinefor Boring P sit-Holes; 4and I do hereby declare that the following is afull, clear, andexact description thereof, which will nable thoseskilled in the art to make and use the same, reference being had .to theaccompanying drawings, li' rming part of this specification.

This invention relates to a machine fortboring h les inthe ground forfence-posts; and it consists in. operating a" verticalboring-bar bycrank and gearing, an in an arrangement whereby' the auger is fed downinto the-ground by a screw, and raised fromthe ground` b a lever;l andalso in the manner in which the feedingscrew nut is made to engage withand is detached fro the boring-bar; and also in a boring-tube, as willhereinafter be more fully described. l i y Figure 1 represents asideelevation of the machine,'showing the parts'of which `it is composed,and the manner in which they are arranged. y y Y i i y Figure 2represeuts'a longitudinal section of the boring-tube,I showing themanner in which it is attached to the auger.

Figure 3 is a horizontal section through the line xx, showing the mannerin whichthe screw-feed is applied i and detached.

Similarletters of'reference indicate correspondingparts.

The operating parts of this machine are attached to an upright post orstand, A, which is supported on a platform, marked B, i C is theboring-bar or spindle, to the lower end of which the auger is attached.D is the auger. E is a tube, which restsupon and is attached to theauger by hooks on opposite sides, which hooks pass Vthrough holes intheauger, as seenfin iig. 2 at f. The boring-bar C Vis of a lsquare orangular form up to the point g, from whence it is rounded with ascrew-thread-cut upon it, as represented.- H is a sleeve, with a squareor angular hole, through which the bar passes, aud to which thebevel-wheel J is attached. The sleeve H is` supported bythe horizontalarm K, iu which arm it revolves with the bar, as a journal for the bar.L is another bevel-wheel, which engages with the wheel J', and which issupported on the horizontal driving-shaft m. This shaft m is supportedbythe main post A, and by a short stand, n, on the-transverse arm K, as'seen lin the drawing. o is the erank,`.by which the machine isdriven. i

It will be seen that. the gear-wheel J 4is rigidly attached to thesleeve H, and that the square boring-bar passes through the sleeve,whichisleeve revolves in the arm K, consequently when the crank isturned the bar is revolved, and the auger operated. The auger is fedinto the ground by a screw-thread out in a half nut, o',

which is attached -to-the lever marked P, Thisplever P, is supported byarms, r 1', (which project from the stand A,) on pivots or on anarbor,'s, so that the lever, with the halfnut, may be given a lateralmotion, and the nut be thrown' back and forth, so as toV engage with thescrew of the bar G, as may be'desired. The lever P is operated by acam-lever, T, towhich it is attached by a exible or jointed connection,as seen in the drawing. U is a lever, which passes over' the top of themain stand A, one end of which lever is connected with the boring-bar,as,see.n. To the other end there is a chain or rope, V, for drawing downthat end, and thereby raising the other with the boring-berend auger'.

'fWhen the auger is boring, it is fed down by the screw-attachment,which is thrown into gear for that pur posefby. operating the'levers Pand Tnas before stated.` When it is desired to raise the auger from theground,4

the screws are disconnected and the bar is drawn up lbyithe lever asseen in fig. The tube E receives the earth when the auger is boring, sothat when the auger'is withdrawn from the hole the earthis retained inthe tube, and may be swung round with the auger away from the hole, whenit may be dumped. To allow of this:

swinging round the post or stand'A is attached to the platform B bysapivot connection, as seen in the drawing.

W is an arzn on the bottom end of the stand, and X is a bent lever, bywhich themachine is held in a. xed= position. When it is desired to`swing the auger round, the end ofthe lever X is depressed, whichwithdraws the other end from the platform. Whenthc machine is inposition, the lever X is heldin place bythe spr'ihgy, as seezrin thedrawing. v

4 Having thus described my iuventionQI claim as new, and desire tosecure by Letters Patent--v-` 1. The half nut o', and the method ofengaging and detaching theuseme from the boring-bal, substantially esand for the purposes described.

2f vThe tube E, in combination with the augei D, Substantially asdescribed, for the purposes set forth. 3. A post-hole-boring machine, soconstructed as to swing round on the platform, substantially as und forthe purposes described.

" A. Q. ALLIS.

Witnesses: Y

CHARLES WILSON, W. HAL. SIGMAN.

